Not surprisingly, Great Gray Owls are large and gray. The plumage of Great Gray Owls is finely mottled and streaked, and the owls have distinctive black and white markings on their throats. They have large heads without ear-tufts, large facial disks, and yellow eyes. Their plumage is especially fluffy and thick, which makes them look larger-bodied than they really are. Although they are taller and have longer wingspans than Great Horned Owls, they weigh on average 15% less.